Comfort! Max comfort. Also close to indestructible. I have strange shaped and very wide feet for their length, the beginnings of arthritis and so all fashion shoes are more or less painful to wear. I can’t wear thongs anymore so crocs are my summer go to. Lovely resilient soles, can’t be destroyed by water or walking, don’t rub or blister my feet (something I’ve had to deal with all my life due to fishbelly white skin) even when sweaty. So they look like shit - but who cares? It’s worth it for feet that don’t hurt. I do flip the backstrap forward and wear them as slides though. I like that the front bit protects my feet quite well from sunburn and tripping hazards. Only downside to crocs is packing them in a suitcase - they take up a shittonne of room. And they’re not really suitable for gardening as the soles are a bit squishy for using a spade (at least for me) and weeds/seeds tend to collect inside.